Power lab

Purpose - Find the most powerful person in the classroom

Calculations

1. Conversions:

centimeters to meters(100 cm = 1 m)

inches to meters (1 m = 39.4 in) (if needed)

pounds to newtons (1 lb = 4.45 N)

2. Total displacement

Distance(x) = ( depth of one stair) x number of stairs =

Distance(y) = height of one stair x number of stairs =

Use Pythagorean Theorem to solve for total displacement

3. Average time = Sum of all times/ number of trials

4. Power = Force x distance /time

Questions

1. Write a energy pie charts for bottom, middle and top of steps.

2. Was your hypothesis correct? Why or why not?

3. If you were designing a motor, what would you need to do (in general terms) to increase its power?

4. How much horsepower did you generate? 1 HP = 747 Watts

Conclusion -

State your hypothesis (who did you think was most powerful in the class? in your group?)

Compare your hypothesis to the actual values.

What have you learned about power?

Errors?